Basically a recalc of this feat.

I went into Source Film Maker and took two scout models. One for him standing, and one in a pose similar to the one in Meet the Medic.

Scout Standing = 299 px

Scout Explosion Pose = 166 px

According to this, Scout is 70 in, or 177.8 cm

177.8/299 = 0.59464882943 cm per pixel

166 x 0.59464882943 = 98.7117056854 cm for Scout’s explosion pose height

Now onto the actual explosion itself:

Scout = 12 px

Scout explosion pose height =  98.7117056854 cm

98.7117056854/12 = 8.22597547378 cm per pixel

Explosion diameter = 108 px

108/2 = 54

54 x 8.22597547378 = 444.202675584 cm explosion radius

4.442026755840000618 meters explosion radius

The formula for ground explosions is W = R^3*((27136*P+8649)^(1/2)/13568-93/13568)^2. Pressure is 1.37895 bars. Plug all the numbers in, and we get this:

W = 4.442026755840000618^3*((27136*1.37895+8649)^(1/2)/13568-93/13568)^2 =

0.0070441569784456613398938415550722094823590122267093317146228286 tons

Rounded that is 0.007 tons, or Small Building level